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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Spelling suggestions: "subject:"einstein universes"" "subject:"einstein diverses""

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Study of cohomogeneity one three dimensional Einstein universe / Etudes des espaces d'Einstein tridimensionnels de cohomogénéité un

Hassani, Masoud 04 July 2018 (has links)
Dans cette thèse des actions conformes de cohomogénéité un sur l'univers d'Einstein tridimensionel sont classifiées. Notre stratégie est d'établir dans un premier temps quel peut être le groupe de transformations conformes impliqué, à conjugaison près. Nous décrivons aussi la topologie et la nature causale des orbites d'une telle action. / In this thesis, the conformal actions of cohomogeneity one on the three-dimensional Einstein universe are classified. Our strategy in this study is to determine the representation of the acting group in the group of conformal transformations of Einstein universe up to conjugacy. Also, we describe the topology and the causal character of the orbits induced by cohomogeneity one actions in Einstein universe.
Univers d'Einstein
Action de Groupe
Géométrie Loretzienne
Géométrie Conforme
Cohomogeneity one
Einstein Universes
Lorentzian Geometry
Conformal Geometry
Group actions
Cohomogeneity one

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